*) Adding possibility to do a settings migration on yacy startup

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@1149 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/de/anomic/server/serverAbstractSwitch.java

@@ -49,6 +49,7 @@ import java.util.Map;
 import java.util.TreeMap;
 
 import de.anomic.server.logging.serverLog;
+import de.anomic.yacy.yacyVersion;
 
 public abstract class serverAbstractSwitch implements serverSwitch {
 
@@ -77,7 +78,7 @@ public abstract class serverAbstractSwitch implements serverSwitch {
 	new File(configFile.getParent()).mkdir();
 
 	// predefine init's
-	Map initProps;
+	Map initProps, removedProps = new HashMap();
 	if (initFile.exists()) initProps = serverFileUtils.loadHashMap(initFile); else initProps = new HashMap();
 
 	// load config's from last save
@@ -90,8 +91,15 @@ public abstract class serverAbstractSwitch implements serverSwitch {
 	    String key;
 	    while (i.hasNext()) {
 	        key = (String) i.next();
-		if (!(initProps.containsKey(key))) i.remove();
+	        if (!(initProps.containsKey(key))) {
+                removedProps.put(key,this.configProps.get(key));
+                i.remove();
             }
+	    }
+
+        // doing a config settings migration
+        HashMap migratedSettings = yacyVersion.migrateSwitchboardConfigSettings(this,(HashMap) removedProps);
+        configProps.putAll(migratedSettings);
         
 	    // merge new props from init to config
 	    // this is necessary for migration, when new properties are attached

source/de/anomic/yacy/yacyVersion.java

@@ -1,6 +1,9 @@
 package de.anomic.yacy;
 
+import java.util.HashMap;
+
 import de.anomic.plasma.plasmaSwitchboard;
+import de.anomic.server.serverAbstractSwitch;
 import de.anomic.server.serverCodings;
 
 public final class yacyVersion {    
@@ -42,4 +45,12 @@ public final class yacyVersion {
             sb.setConfig("downloadAccountBase64", "");
         }
     }
+    
+    public static HashMap migrateSwitchboardConfigSettings(serverAbstractSwitch sb, HashMap removedSettings) {
+        if ((removedSettings == null)||(removedSettings.size() == 0)) return null;
+        HashMap migratedSettings = new HashMap();        
+        
+        return migratedSettings;
+        
+    }
 }